Questions tagged [volumetrics]

Questions about rendering with volumes (smoke, fog, etc.). Use this tag for both Blender Internal and Cycles.

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2
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1answer
874 views

God Rays through window pane: Cycles

I'm creating a scene for a project and I wanted to go for the god ray effect achieved by the lights passing through the window. I added a mesh onto which volume scatter node was added, but still, even ...
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0answers
15 views

2.83 Volumetric Light flickers when camera moves

Volumetric light always flickers in Eevee when the camera is moving. There's also DOF, but it flickers even when it's off. In this particular video it does not seem that horrible of an issue, but in ...
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1answer
348 views

Volumetric Light not working on Cycles (but good in preview)

The volumetric Light shows pretty well in viewport preview, but doesn't render at all in Cycles. 4 point lights - Strength: 1000 A cube with a Volume Scatter / Density: 0.2 / Anisotrop: 0 I've made ...
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1answer
20 views

Eevee volumetrics different in render

When I was trying to make a cloud in Blender, I began to notice a strange issue. When the cloud is rendered using Eevee in the viewport, it looks fine. But when I render it, it looks much more ...
0
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1answer
27 views

How to create moving, dynamic/animated fog/clouds?

I watched tutorials on how to create fog within bounding boxes, but the fog is static. I'm trying to create a scene of an airplane where the camera is looking down on the clouds, and the clouds should ...
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0answers
7 views

Blender 2.8.3, Volume Scatter Fog, Does not scale up with mesh

I am using Blender 2.8.3 and am watching this video to create fog in my scene. However, the after applying the volume scatter node to my material output, it appears but not to the scale of my bounding ...
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0answers
17 views

Principled volume looks completely different between Eevee and Cycles

I am having an issue getting a volume shader to render properly in cycles. It looks essentially how I expect it to in eevee, but for some reason the black part of the render becomes a little distorted ...
1
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1answer
51 views

Fog in Blender: Through World node or Object Node?

I recently started to work with the volume shader in Blender 2.83. I've got two questions: What is the difference between connecting Volume Scatter to WORLD NODE and OBJECT NODE? Which shader is ...
9
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1answer
605 views

Visualizing 3D voxel data in Blender 2.8

right now I'm trying to visualize my scientific 3D data in Blender 2.8. So blenders built in textures or smoke simulations do not lead to the goal. I've read that older releases of Blender do support ...
1
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0answers
19 views

Black cubes appearing using multiple VDBs

Hi wonderful Blender folks, I've imported multiple VDB files to create smoke in this scene, and in Evee it renders fine, in solid it looks normal, but in Cycles these weird black cubes appear, and in ...
0
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1answer
30 views

Volume Absorption is only applied to the “top” of a mesh

I am following the BlenderGuru tutorial of making a cup of coffee, but when I make the coffee liquid using volume absorption, the coffee only appears to absorb light from the top. When I adjust the ...
2
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2answers
296 views

Sunbeams! But without blurring of the rest of the scene?

I have a scene, rendered in Eevee! I also have some sun rays, with a spotlight and cube that provides volumetrics! But... The cube providing volumetric also makes the rest of the scene really blurry....
9
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1answer
7k views

How to do volumetric lighting for a forest scene?

I have scene that looks like this: And I want to add volumetric lighting to it so that light forms a rays of light when it go through the trees like on this example that I found in youtube: But the ...
0
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1answer
23 views

Flames show in viewport but not in render

I've been trying to render out a simple fire/smoke sim. Everything looks fine in viewport but when rendered the flames do not show. I'm using cycles with optix in blender 2.83 steam release, on ...
0
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1answer
452 views

EEVEE Volumetric Light exlusion

I need to exclude a point light from volumetrics lights. I tried placing a cube that surround only the spot light with a "Volume Scatter" node but it catch also volumetrics from the point light. It ...
0
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0answers
24 views

Import volumetric data to Blender 2.83

Dear Blender Community, since Blender has a brand new volume object type, I'm trying to import volumetric data which is not in openVDB file format because it was generated during a physical ...
1
vote
1answer
92 views

How to access the list of volume grids using python?

I wanted to access the attributes imported with a vdb file but I have no idea how to do that. Actually what I was trying to do is - In the attribute node in material for the vdb file I wanted to get ...
2
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0answers
330 views

Issue with Volume Absorption inside Glass

first time posting here and very new to blender, Im following BlenderGuru's latest tutorial and I'm having some issues with volume absorption, this is of course not a job, I don't have a deadline, so ...
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0answers
676 views

I can't render volumetric lights in Eevee with an orthographic camera

So this is the problem I'm having, when I render volumetric lights in Eevee, they don't show up with an orthographic Camera, but they do when using a perspective camera. Why is that? is there a way to ...
1
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0answers
19 views

Is there any way to use Cycles for 3D data visualization?

I have a CSV file containing coordinates for stars in a galaxy and I want to plot them through volumetric data inside a cube. I have tried the voxel data type in blender 2.79 with blender render (it ...
0
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0answers
10 views

Precise control of fog falloff/density?

Is there a way to set up a fog volume (in Eevee) so that you get zero fog for a set distance, and then a way of controlling the density with a color ramp for another set distance?
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0answers
16 views

Problem on creating fogs

Hi want to create a fog in blender 2.82 but when I add principle volume or volume scatter to the cube , the fog remains in the original size of the cube and I can't scale.
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0answers
33 views

Problems with transparent glass image output in Cycles

I'm working on illustrations for a chemistry curriculum. The background world setup is a very light grey with some rough studio lighting approximation. I'm using a volume inside the glass beakers as ...
0
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1answer
28 views

Unusual artefacts in volume render

I am using Blender 2.82a (Cycles) to create a fuzzy ball. However I am getting this strange ring of artefacts in the rendered image, where the alpha channel shows through - I am not getting the smooth ...
1
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2answers
68 views

volume scatter in blender giving me a dark screen with some crazy amounts of fireflies

I have attached volume scatter node to the world volume. So What I have right here is a super simple scene where the light is coming from a spot lamp and falling on the ground. Ok so in this picture ...
2
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0answers
28 views

Is there any support in Cycle or Eevee for volumetric data rendering on a non-uniform grid?

I have some volumetric data (on a non-uniform grid) in files and I would like to be able to use blender to make volume rendering of them. The difficulty here is that the data is actually sampled on ...
4
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2answers
306 views

Copying these fluffy clouds?

So, there's plenty of cloud questions and tuts out there, but none seem to give me what I want, or work in 2.8. The guy I followed, this is what he came out with. The top left is his render, the top ...
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0answers
13 views

Volume shader always makes a cube [duplicate]

Whenever I add a volume shader (of any type) to a mesh, the resulting fog effect always appears as a cube, regardless of the shape of the mesh itself. How do I get volumetric effects to conform to any ...
0
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0answers
30 views

Adding distant fog with the sun lamp

I've been using a sun lamp to light an outdoor environment in the Eevee engine. I've got a HDRI but only as an image (no lighting data) because I didn't enjoy how it lit up the environment and I ...
0
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0answers
8 views

Shadows disappear when you turn on volume absorption in gpu render (Open CL)

Blender: 2.82a Gpu: rx5700 Whenever I try to turn on volume absorption in the glass I'm trying to render the shadows disappear. It doesn't matter if I use the principal shader or the glass one the ...
0
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1answer
36 views

Why is my Eevee viewport render different from my full render?

I'm a little confused why my Eevee render looks different from the viewport preview. Above - Preview Above - Render Just a bit confused here. Any help appreciated.
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0answers
12 views

Smoke not Rendering in Eevee but Does Render in 3D Viewport

I am tearing my hair out with these smoke simulations. It's very difficult to get the right texture and colour of smoke simulations when the object is moving or there is a wind force field. In this ...
3
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1answer
195 views

Transparent object shaddows in volume material [Blender Internal]

Currently I am fighting with lighting artefacts within a smoke simulation, when the lightsource is within the volume and especially also within a transparent object within this volume. (Note this ...
0
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1answer
35 views

Glitchy lighting for volumetric clouds

I'm new to Blender and followed a tutorial I found online https://www.youtube.com/watch?v=lPAYX8z9i8M&t=495s to create a procedural cloud. I got a single cloud right, however, when I scaled it up ...
0
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1answer
113 views

Blender Internal -> Rendering: Stopping surface materials of background objects from affecting volumetric materials of objects in the foreground

The problem as demonstrated by the images of my animation below is that the edges of the surface material objects in the background (shells of the atomic orbitals in this case) wash through the ...
0
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1answer
33 views

Large scale volume lights

I'm setting up a large scale space scene, and trying to get some volumetric lights - like god rays. However when scaling up the volume cube, to sizes like 10,000 units the god rays disapear. I can ...
0
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0answers
20 views

Volumetric lightening visible in render preview but not in final render

I created a scene with spot light coming through the window. It looks good in the render preview however in final render (Evee) the result is totally different from what it looks like in the preview. ...
-1
votes
1answer
35 views

Volumetrics behind glass arent working in Cycles

Im currently trying to render a scene in Blender 2.8 with Cycles out of the inside of a car. The side and windows are all basic BSDF Glass Shader. Outside of the car is a cube with a basic BSDF ...
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0answers
15 views

Why can't I enable volumetrics?

I don't see the checkbox that I remembered before, plus on the tutorials. I am on Blender 2.82a
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0answers
14 views

Blender custom point density from file

I'm scoping out solutions for rendering custom volumetric data that I'll be parsing from some external source (a simulation being run externally to Blender). I'd like to use Blender's volumetric ...
0
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0answers
16 views

Point light and Fog in eeve blender2.8

I'm having issue using point light and fog, we can see an emitter point from the light even if i try to hide it behind the object, it doesn't really show in one picture but we can really see them in ...
2
votes
1answer
109 views

Volumetric light without fog

I'm using blender 2.8. I was wondering is there any way to create volumetric light without fog (or just a little bit) ? There are some tutorials on Youtube but almost all of them are creating ...
0
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0answers
15 views

How can i make a cloud in the form of a ring?

I've added a torus to my scene and applied a cloud shader I made using CGMatter's Youtube tutorial. He uses a cube to make normal clouds, but what I'm trying to create is the inside of the eye of the ...
4
votes
1answer
64 views

How to control light spread in a volume?

Quick question, is there any possibility to control the Area light somehow? I want to achieve a similar effect as you can see in the following image. Basically I need a higher contrast and would like ...
1
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0answers
14 views

Volume absorbtion: Material doesnt fully covered the mesh

Based on this tutorial https://www.youtube.com/watch?v=fdWUjEMzDhg&list=PLjEaoINr3zgEq0u2MzVgAaHEBt--xLB6U&t=431s I tried to change the liquid in a cup into coffee by adding Volume Absorbtion....
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0answers
50 views

Eevee Blender Volumetric Rendering (No Color)

I've created a small node setup in eevee for some volumetrics: The density network works, but for whatever reason, the color just shows up as black (hopefully compression doesn't butcher this): My ...
0
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0answers
22 views

Techniques to composite geometry and volumetrics together for an animation

Hello everyone I hope you are hanging in there! I spent about 2 hours trying to figure this out with Stack and YouTube but still can't wrap my head around this. The scene below will eventually ...
3
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2answers
125 views

Bug? Voxel Data Animation Issue (Still Frame Number Keyframe not rendering)

EDIT: I found a workaround to this (see post below), however, the keyframe input with Still Frame Only, does not work. So I can only setup a scene of duration my number of frame in the texture. Any ...
1
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0answers
31 views

Problems with Transparency when rendering with Volumetric shaders

When I render it in viewport then it looks normal: For the fire, I just youse a normal Principled Volum shader that is plugged into Volume of the material Output. I render with two layers one for the ...
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0answers
15 views

I am facing issue of volumetric effect in blender 2.8

Volumetric light not working in render evee and cycles but fog is visible in viewport. When i render it solid color appear see imagesviewport

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